Composite bag



July 19, 1932. J. MQMuNsoN 1,868,069

COMPOSITE BAG Filed July 16. 1931 2A Sheets-Sheet l 'EM i A. grr/vanto@ July 19, 1932. J, M MUNSON 1,868,069

COMPOSITE BAG Filed July 16, 1931 2 Sheets-Sheet 2 gum-nica Patented July 19, 1932 UNITED STATES JOHN MITCHELL MUNSON, OF LAKEWOOD, OHIO COMPOSITE BAGv Application filed July 16,

This invention relates to composite bags and analogous containers or wrappers, and particularly to bags or containers of the moisture proof type made up in whole or 1n l5' part of cellulosic or like transparent nonbrous material such, for example, as that commonly known to the trade as cellophane.

It is well known that transparent cellulosic 1o or non-fibrous material such as cellophane is affected by atmospheric and temperature conditions and becomes brittle and is liable to break at the fold lines particularly if any substantial period of time elapses between the time of fold and the time of use. The thicker the cellophane, the greater will be the bending strain and the more readily will it break when creased or folded. In the manufacture of bags from cellophane or like cellulosic or non-fibrous materials, it is therefore desirable to use cellulosic materialnof relatively thin gauge and reinforce the material, to ensure against rupture of the bag when placed in use. One method of reinforcement which has found more or less commercial use is a double bag construction, one wall being of moisture proof cellophane and the other wall being of normal or untreated cellophane, the object being to provide a moisture proof bag possessing the advantage of transparency without sacricing the necessary strength. Such bags, however, are relatively expensive to manufacture due to the cost of the material. If the moisture-proof cellophane is reinforced by an outer bag or surrounding Wall of paper, theadvantage of visibility of the contents is lost. To reduce the cost of manufacture and yet retain visibility of the bag contents, it has been proposed to provide a paper bag having an insert or transparent panel of cellulosic material which is cemented or otherwise joined to the paper. A disadvantage of such type of bag is that it is not moisture-proof and hence is not suitable for certain products.

It is an object of the present invention to provide a reinforced moisture-proof bag or container, which possesses the advantages of transparency or visibility of its contents, and

1931. Serial No. 551,135.

which may be manufactured at a relatively low cost. l

Other objects and advantages will become apparent in view of the following description taken in conjunction with the drawings, wherein Fig. 1 is a view in elevation of a satchel or flat type of bag embodying the features of my invention, the bag being shown in folded condition;

Fig. 2. isa horizontal sectional view showing the bag partially opened;

Fig. 3 1s a perspective view of `the bag lled with a product;

Figs. 4, 5 and 6 are views similar to Fig. 65 2 of modifications in structure;

Figs. 7 to 14, inclusive, are sectional views of gusset or bellows bays showing various types of construction embodying the features of my invention.

Referring to the drawings and particularly to Figs.. 1, 2 and 8, the bag as illustrated comprises a liner or container proper 5 of waterproof cellulosic material such as cellophane which may be of relatively thin gauge and is folded into the desired shape with the edges overlapping and joined at the back of the bag, as at 6, at a point where substantially no creasing or bending takes place. Starting at the front of the bag and enveloping so the corners and lines of fold I provide areinforcing outer backing or cover .7, which may be paper or any other suitable material. The parts of thte bag may be secured together.

I prefer, however to adopt particular methods of cooperatively securing the parts of the bag together which further reinforces the bag as a whole by applying adhesive at various points. In the form of bag shown by Figs. l and 2, the backing 7 is cemented 90 to the cellophane liner at the front of the bag at 8 (note Fig. 2) and is formed in two parts and joined at the'ba'ck of the bag at 9. At the back of the bag the reinforcing material is again cemented to the cellophane at the inner si'deof the joint 9 at the v'point 9, and the cellophane is cemented to the pa! per on the outer side of the joint 6 at the point 6a. It will thus be seen that the cellophane liner .is fully reinforced at all Corners by standard bag-making machines of vari ous types.v The cellulosic material and paper may be delivered to the machine from rolls of stock and suitable adhesive material applied to the overlapping edges at the points of jointure. The composite strips or sheets are then formed into a tube, after which the forme'd tube may be severed into individual lengths and the bottoms folded oyi and secured in any standard form as desir Figs. 7 to 14, inclusive, illustrate diiferent methods of composite bag construction, each having features in common with my invention.

Figs. 2, 4, 5 and 6 and Figs. 7,10, 8 and 9 are substantially similar as far as the features of invention are concerned, the difference being that in Figs.,2, 4, 5 and 6 a iiat or Satchel bottom type of bag is shown, while Figs. 7, 10, 8 and 9 show a gusset or bellows type of bag. Fig. 7 has features in common with Fig. 2, already described, and like reference numerals are applied thereto. In Figs. 4 and 10, the cellulosic liner 5 is formed in one continuous strip and joined in the center of the front panel 10 at 14, while the backing 7 is comprised of an unbroken strip of paper or the like and cemented to the cellophane at 8. l

In Figs. 5 and 8 the liner 5 is reinforced at the sides, only, by separate strips 7a and 7 b of paper or the like, leaving transparent panels 10 and 11 at both sides of the bag, the cellulosic sheet being joined at the back. In this instance, the paper may be cemented to the cellophane at the points 8 and 8.

In Figs. 6 and 9 the construction is similar to Figs. 5 and 8 with the exception that the joint 14 is reinforced by a strip of paper or the like, as at 12. This reinforcing strip mai?7 also be of transparent material.

igs. 11 to 14, inclusive, show the cellulosic sheet 5 on the outside of the bag and the reinforcing material on the inside thereof. The bags shown are of the gusset type, but it will be obvious that this is simply for the purposes of illustration and that Satchel bottom bags could be constructed in the manner shown without departin from the scope of the invention. Fig. 11 1s substantially similarv to Fig. 8 with the exception that the strips 7 and b are inside of the bag.

In Fig. 12 the cellulosic sheet 5 is reinforced at all points except the front by the liner of paper or the like. This figure also shows a cooperative double overlapping construction of the cellulosic joint 14 and paper joint 9 tending to strengthen the joints.

Fig. 13 shows an unjointed inside reinforcing liner 7 and an outer cover 5 of cellulosic material, the latter being joined in the or bag proper formed of a sheet of cellulosic... material which is reinforced by one or more strips or sheets of material such as paper in any suitable manner.

claim:

1. A composite bag comprising a sheet of transparent cellulosic material treated to render it moisture-proof and joined at the front or back panel of the bag, and a reinforcing sheet of paper or likematerial secured to said cellulosic sheet at the sides of the front panel and forming a double wall around the remainder of the bag.

2. A bag for display and vending purposes having at least one panel transparent to provide a Window, said bag comprising a bag proper formed of a sheet of transparent cellulosic material, and areinforcing sheet of paper or like materialsecured to said cellulosic sheet and covering all of the latter except the window, the cellulosic and paper sheets each being joined at an unfolded side of the bag, the cellulosic joint being secured to the paper sheet and the paper jomt being secured to the cellulosic sheet, thereby producir a co-operative reinforcing structure.

3. bag for display and vending purposes having at least one panel transparent to provide a window, said bag comprising a bag proper formed of a sheet of transparent cellulosic material, and a reinforcing sheet of paper or like material covering said ce1- lulosic sheet over the lines of fold and leaving a panel uncovered to provide a transparent portion defining a window, the cellulosic and aper sheets each being joinedat the back el) the bag, the cellulosic joint being secured to the paper sheet and the paper.

joint beingsecured to the cellulosic sheet, thereby producing a co-operative reinforceing structure.

4. A bag for display and vending purl poses having at least one anel transparent to provide a window, said ag comprisin a sheet of cellophane joined at the meetlng edges and forming the bag proper, and -a reinforcing sheet of paper joined to the cellophane at the sides of the window 'and forming a double wallv around the remainder of theA bag.

5. A bag for display and vending purposes having a transparent portion to provide a window, said bag comprising a sheet proper, and a reinforcing sheet of paper or y like fiexible reinforcing material joined to the cellulosic sheet adjacent the window and forming a double wall around the remainder of the bag.

6. A bag for display and vending purposes comprisin a sheet of transparent cellulosic material joined at the meeting edges and forming the bag pro er, and a reinforcing sheet of paper or lille flexible reinforcing material joined to the cellulosic sheet leaving a portion of an unfolded panel of said transparent cellulosic sheet uncovered to provide a window and forming a double wall around the remainder of the bag.

In testimony whereof I hereunto aiix my signature this 14th day of July, 1931.

JOHN MITCHELL MUN SON. 

